Clearly she now considers you a "friend" of the non-sexual kind. Your window of hunky assertiveness has closed shut. Your best hope now is to basically see her as a "friend" only, with no hint of sexual desperation whatsoever. Put her in the role of being a "pivot" from which you can hook up w/her cute friends or other women who see you hanging out with her. This MIGHT get her to turn to pursuing you. The concept is by aiming past her, you drag her into your persoanl vortex of awesomeness. Kind of like running through the finish line to win the race, instead of aiming at it.
The question is how to get her to hang out. This thread has already provided an angle:
(said with a small smile) "Hey you know, you're kind of cute...mind if I Facebook stalk you sometime?"
If she's at all hot, this will trigger an "OMG!" barrage of stories from her of all the creepy guys who have stalked her in the past. You are now "in" and just need to kick back, relax and enjoy the ride, of course suggesting she come over and watch that Weird Al video clip someone posted earlier in the thread. A few laughs, a little wine and some horseplay....